Building-block mold.



PATLNTLD JUNE 27, 1905. No' 793539 J. MCL. PLTTYJOHN.

vBUILDING BLOCK MOLD.

APPLICATION FILED FEB. 25.1904.

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a. lr @H lig *Y /N VEN TOR 70m? mLJ@/vm A TTOHNE ys No. 793,539. f 4PATBNTED JUNE 27, 1905.

J. MOL. PBTTYJOHN.

BUILDING BLOGK MOLD.

APPLICATION FILED FEB. 25, 1904.

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A 770/?NE YS l 'L-ttf .parts when removing the NTTED STATES PatentedJune 27, 1905.

PATENT OEEICE.

ONE-HALF TO WILLIAM PANNILL PETTYJOHN, OF TERRE HAUTE,

INDIANA.

BUILDING-BLOCK IVIOLD.

SPECIFICATION forming part of Letters Patent No. 793,539, dated June27', 1905.

Application filed February 25, 1904. Serial No. 195,180.

To 'LH 71171/0711/ 'it 717,!!1/ con/cern:

Be it known that I, JonN MCLAREN PETTY- JoiiN, a citizen of the UnitedStates, and a resident of Terre Haute, in the county of Vigo and Stateof Indiana, have invented certain new and useful Improvements inBuilding- Block Molds, of which the 'following is a specitication. Theobject of my invention is to provide a mold of the character stated forthe manufacture of artificial-stone blocks involving certain features ofnovelty whereby it is rendered better adapted for molding purposesgenerally, and particularly for molding hollow and also rough-facebuilding-blocks.

The invention consists of the new and improved mold` which willhereinafter be fully described, and shown by the accompanying drawings.

More definitely stated, the invention resides in the specialconstruction, arrangement, and combination of parts, which l will nowproceed to describe in detail and point out the novel features in thesubjoined claim.

In the drawings, Figure 1 is a perspective View illustrating myinvention.l Fig. 2.is a central vertical sectional view through my mold,the section being taken on line 2 2 of Fig. 4. Fig. 3 is a detail planView showing the cam-plate on the under side of the pallet. Fig. 4 is ahorizontal sectional view taken on line t 4 of Fig. 2, and Fig. 5 is anenlarged detail View illustratingI the movement of the mold-box from amolded bl'ock.

In the practice of my invention I employ a mold having' sides and endsmade laterally adjustable through peculiar framing and novel connectingmeans. Minor features are also employed, the same as will be describedfarther on.

Referring to the drawings, A A denote, respectively, upper and lowersurrounding reetangular frames connected and held spaced apart one abovethe other by suitable bolts or means B, adapted for the purpose. i

C denotes suitable plates forming the adjustable sides of the mold-box,and D similar ends for the mold-box.

On the under sides of the frames A A, I arrange brackets E E', andsimilar brackets F F are larranged on the outer side wall of the boxends D and sides C. According to my invention the brackets E F and El F'are connected by rigid arms G, Whose point of connection H to the saidbrackets is designed to be on the dead -center or horizontally disposedor in line when the parts are in normal molding position, and therebyeffect bracing of the side and end plates C D against internal pressureof the material being molded, as will be understood.

I denotes a suitable hopper whose lower opening' is made correspondingto the interior space in themold-box and is tiXedly heldjust above theupper edge of the mold-box sides and ends when they are in moldingposition by supporting-braclets J, secured on the upper side of thesurrounding frame A.

In the practice of my invention the ends D of the mold-box are made toenter sufficiently between the side walls O thereof to provide anunbroken inclosing wall for the material being molded. To facilitateworking of the mold,hand les K may be secured to the frame A.

In the mold-box [arrange a suitable pallet L, preferably constructed ofwood. This pallet is designed to rest upon the ground or other placewhere the block is molded and may be left until it is sold or to becarried away for building or other purposes. It serves not only as abottom for the mold-box, but to provide support for cores M, arranged inthe mold-box for forming openings through the block when the same isbeing molded. It will be noticed that the lower end of the cores M haveprojections or pins N,'which enter suitable recesses O in the upper sideof the pallet L. The upper end of the cores may have suitable earsadapted to be struck with a hammer or other device for loosening thecores from the plastic material, and thereby adapting them to bewithdrawn without'in- .jury to the block being molded.

, gated opening S in the pallet.

elongated opening S is made, through which the nut R on the end of therod Q may be passed.

The nut is designed to effect locking engagement with the under side ofthe pallet by being turned at right angle with the elon- The openingsare protected by suitable plates T, having oppositely-inclined cams U,with which the ends of the nuts R engage when they are turned to lockingposition at right angle to the length of the openings S in the palletand whereby the cores M are drawn down upon the pallet and securelyclamped thereto.

Within the mold-box facing-plates V may be arranged, the same beingconstructed with roughened sides and projections for forming endrecesses in the block being molded, and also to provide it with abroken-rock face or other desired outer surface.

In connection with my mold I may employ a tamping-plate W, madeconforming to the shape of the block being molded. In use this plate isarranged in the mold on top of the concrete and adapted upon simplepressure or tamping action being applied thereon for imparting anupper'smooth surface to the finished block.

rl`he construction of my improved mold will be understood from the abovedescription.

lt will be noticed that when the mold is ready to be filled withconcrete or other material the points of connection H of the brackets EE and F F to the arms Gr are on a dead-center, and thus through supportof the frames A A the sides C and ends D of the mold-box are bracedagainst any pressure on the inside caused by tamping of the materialbeing molded.

When the stone is finished, the surrounding frames are lifted by thehandles thereon and the sides and ends of the mold-box drawn laterallyaway from the stone or block without change of their upright or moldingposition, thereby enabling the operator to lift the mold up from thestone without liability to marring or otherwise disiiguring itsconformation.

I would have it understood that I do not limit myself to the identicalmeans shown and described for imparting the lateral separating movementto the sides and ends of the moldbox, since such construction may bevariously modified without departing from the spirit of the invention.

My invention possesses advantage over all other molds known to me notonly in the features of novelty above described, but in its simplicityof construction, lightness, and the minimum expense with which it may bemanufactured. Its chief advantage resides in the means employed adaptingthe mold to be removed from the block with little or no danger ofmarring it, and also for leaving thc` block where it is made.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

The combination in a mold adapted to be lifted from the material beingmolded and distantly placed for the next molding action. of a box havingseparate sides and ends, a bottom from which said sides and ends may befreely lifted, a core adapted for arrangement within JOIIN MeliARENPETTYJOIIN.

Vitnesses:

E. E. GLovER, JAMES E. STEWART.

